使用 Aspose Words 将页码替换为条码

Question

这可能是一个愚蠢的问题，但我无法找到答案，一天后我转向整个社区寻求帮助......

我正在使用 Aspose for Word（C# 或 .Net），并尝试将生成的页码替换为我自己创建的条形码图像。我目前可以使用字体来做到这一点，但我发现它们对我的条形码阅读器不太可靠，因此需要能够从页码读取值并将其替换为我自己创建的图像。

所以我真的需要找到编号容器，读取其中的值并替换它。一旦我有了创建条形码并插入它就很容易了。

谁能帮忙？

目前的方法（对不起，它很乱，但我一直在尝试新事物）：

internal static void SetFooters(ref Document doc)
    {
        doc.FirstSection.HeadersFooters.LinkToPrevious(false);
        var builder = new DocumentBuilder(doc);
        builder.MoveToDocumentStart();
        Section currentSection = builder.CurrentSection;
        PageSetup pageSetup = currentSection.PageSetup;
        int totalPages = doc.PageCount;
        int j = 1;
        foreach (Section sect in doc.Sections)
        {
            //Loop through all headers/footers
            foreach (HeaderFooter hf in sect.HeadersFooters)
            {
                if (
                hf.HeaderFooterType == HeaderFooterType.FooterPrimary || hf.HeaderFooterType == HeaderFooterType.FooterEven || hf.HeaderFooterType == HeaderFooterType.FooterFirst)
                {
                    builder.MoveToHeaderFooter(hf.HeaderFooterType);
                    Field page = builder.InsertField("PAGE");
                    builder.Document.UpdatePageLayout();
                    try
                    {
                        page.Update();
                    }
                    catch { }

                    int pageNumber = j;
                    if (int.TryParse(page.Result, out pageNumber))
                    { j++; }
                    // Remove PAGE field.
                    page.Remove();
                    builder.Write(string.Format("{0}/{1}", pageNumber, totalPages));
                }
            }
        }
    }

Answer 1

HeaderFooter 是节级节点，只能是 Section 的子节点。页眉/页脚内的页面字段返回最新更新的值，并且对于一个部分的所有页面来说，它将是相同的值。

在您的情况下，我建议您在每个页面的顶部/底部插入文本框并在其中插入所需的内容。以下代码示例在文档的每一页上插入文本框，并在其中插入页面字段和一些文本。希望这对您有所帮助。

public static void InsertTextBoxAtEachPage()
{
    string filePathIn = MyDir + @"input.docx";
    string filePathOut = MyDir + @"output.docx";

    Document doc = new Document(filePathIn);

    DocumentBuilder builder = new DocumentBuilder(doc);
    LayoutCollector collector = new LayoutCollector(doc);

    int pageIndex = 1;
    foreach (Section section in doc.Sections)
    {
        NodeCollection paragraphs = section.Body.GetChildNodes(NodeType.Paragraph, true);
        foreach (Paragraph para in paragraphs)
        {
            if (collector.GetStartPageIndex(para) == pageIndex)
            {
                builder.MoveToParagraph(paragraphs.IndexOf(para), 0);
                builder.StartBookmark("BM_Page" + pageIndex);
                builder.EndBookmark("BM_Page" + pageIndex);
                pageIndex++;
            }
        }
    }

    collector = new LayoutCollector(doc);
    LayoutEnumerator layoutEnumerator = new LayoutEnumerator(doc);

    const int PageRelativeY = 0;
    const int PageRelativeX = 0;

    foreach (Bookmark bookmark in doc.Range.Bookmarks)
    {
        if (bookmark.Name.StartsWith("BM_"))
        {
            Paragraph para = (Paragraph)bookmark.BookmarkStart.ParentNode;

            Shape textbox = new Shape(doc, Aspose.Words.Drawing.ShapeType.TextBox);

            textbox.Top = PageRelativeY;
            textbox.Left = PageRelativeX;

            int currentPageNumber = collector.GetStartPageIndex(para);

            string barcodeString = string.Format("page {0} of {1}", currentPageNumber, doc.PageCount);
            string barcodeEncodedString = "some barcode string";

            Paragraph paragraph = new Paragraph(doc);
            ParagraphFormat paragraphFormat = paragraph.ParagraphFormat;
            paragraphFormat.Alignment = ParagraphAlignment.Center;
            Aspose.Words.Style paragraphStyle = paragraphFormat.Style;
            Aspose.Words.Font font = paragraphStyle.Font;
            font.Name = "Tahoma";
            font.Size = 12;
            paragraph.AppendChild(new Run(doc, barcodeEncodedString));
            textbox.AppendChild(paragraph);

            paragraph = new Paragraph(doc);
            paragraphFormat = paragraph.ParagraphFormat;
            paragraphFormat.Alignment = ParagraphAlignment.Center;

            paragraphStyle = paragraphFormat.Style;
            font = paragraphStyle.Font;
            font.Name = "Arial";
            font.Size = 10;
            paragraph.AppendChild(new Run(doc, barcodeString));
            textbox.AppendChild(paragraph);

            //Set the width height according to your requirements
            textbox.Width = doc.FirstSection.PageSetup.PageWidth;
            textbox.Height = 50;
            textbox.BehindText = false;

            para.AppendChild(textbox);

            textbox.RelativeHorizontalPosition = Aspose.Words.Drawing.RelativeHorizontalPosition.Page;
            textbox.RelativeVerticalPosition = Aspose.Words.Drawing.RelativeVerticalPosition.Page;

            bool isInCell = bookmark.BookmarkStart.GetAncestor(NodeType.Cell) != null;
            if (isInCell)
            {
                var renderObject = collector.GetEntity(bookmark.BookmarkStart);
                layoutEnumerator.Current = renderObject;

                layoutEnumerator.MoveParent(LayoutEntityType.Cell);
                RectangleF location = layoutEnumerator.Rectangle;

                textbox.Top = PageRelativeY - location.Y;
                textbox.Left = PageRelativeX - location.X;
            }
        }
    }

    doc.Save(filePathOut, SaveFormat.Docx);
}

我与 Aspose 合作，担任开发人员传道者。